/**
 * Description:利用poi导出excel
 * Copyright: Copyright (HYJF Corporation)2015
 * Company: HYJF Corporation
 *
 * @author: 王坤
 * @version: 1.0
 * Created at: 2015年11月26日 下午6:47:27
 * Modification History:
 * Modified by :
 */

package com.hrd.common.util.file;

import java.io.IOException;
import java.io.Serializable;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.net.URLEncoder;
import java.text.SimpleDateFormat;
import java.util.Collection;
import java.util.Date;
import java.util.Iterator;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFClientAnchor;
import org.apache.poi.hssf.usermodel.HSSFComment;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFPatriarch;
import org.apache.poi.hssf.usermodel.HSSFRichTextString;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;

/**
 * @param <T> 应用泛型，代表任意一个符合javabean风格的类
 *            注意这里为了简单起见，boolean型的属性xxx的get器方式为getXxx(),而不是isXxx()
 *            byte[]表jpg格式的图片数据
 */
public class ExportExcel<T> implements Serializable {

  /**
   * serialVersionUID:序列化id
   */

  private static final long serialVersionUID = -5142024015171582474L;

  /**
   * 这是一个通用的方法，利用了JAVA的反射机制，可以将放置在JAVA集合中并且符号一定条件的数据以EXCEL 的形式输出到指定IO设备上
   *
   * @param sheetName 表格sheet名称
   * @param author    表格作者
   * @param dataset   需要显示的数据集合,集合中一定要放置符合javabean风格的类的对象。此方法支持的
   *                  javabean属性的数据类型有基本数据类型及String,Date,byte[](图片数据)
   * @param pattern   如果有时间数据，设定输出格式。默认为"yyy-MM-dd"
   * @throws IOException
   */
  public void exportExcel(String sheetName, String author, Map<String, String> columnNames, Collection<T> dataset, HttpServletResponse response, String pattern) throws IOException {
    exportExcel(sheetName, author, columnNames, dataset, response.getOutputStream(), pattern);
  }

  /**
   * 这是一个通用的方法，利用了JAVA的反射机制，可以将放置在JAVA集合中并且符号一定条件的数据以EXCEL 的形式输出到指定IO设备上
   *
   * @param sheetName 表格sheet名称
   * @param author    表格作者
   * @param dataset   需要显示的数据集合,集合中一定要放置符合javabean风格的类的对象。此方法支持的
   *                  javabean属性的数据类型有基本数据类型及String,Date,byte[](图片数据)
   * @param out       与输出设备关联的流对象，可以将EXCEL文档导出到本地文件或者网络中
   * @param pattern   如果有时间数据，设定输出格式。默认为"yyy-MM-dd"
   */
  public void exportExcel(String sheetName, String author, Map<String, String> columnNames, Collection<T> dataset, ServletOutputStream out, String pattern) {
    // 声明一个工作薄
    HSSFWorkbook workbook = new HSSFWorkbook();
    // 生成一个表格
    HSSFSheet sheet = workbook.createSheet(sheetName);
    // 生成一个样式
    HSSFCellStyle style = workbook.createCellStyle();
    // 设置这些样式
    style.setFillForegroundColor(HSSFColor.WHITE.index);
    style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
    style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
    style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
    style.setBorderRight(HSSFCellStyle.BORDER_THIN);
    style.setBorderTop(HSSFCellStyle.BORDER_THIN);
    style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
    // 生成一个字体
    HSSFFont font = workbook.createFont();
    font.setColor(HSSFColor.BLACK.index);
    font.setFontHeightInPoints((short) 12);
    font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
    // 把字体应用到当前的样式
    style.setFont(font);
    // 生成并设置另一个样式
    HSSFCellStyle style2 = workbook.createCellStyle();
    style2.setFillForegroundColor(HSSFColor.WHITE.index);
    style2.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
    style2.setBorderBottom(HSSFCellStyle.BORDER_THIN);
    style2.setBorderLeft(HSSFCellStyle.BORDER_THIN);
    style2.setBorderRight(HSSFCellStyle.BORDER_THIN);
    style2.setBorderTop(HSSFCellStyle.BORDER_THIN);
    style2.setAlignment(HSSFCellStyle.ALIGN_CENTER);
    style2.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
    // 生成另一个字体
    HSSFFont font2 = workbook.createFont();
    font2.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);
    // 把字体应用到当前的样式
    style2.setFont(font2);
    // 声明一个画图的顶级管理器
    HSSFPatriarch patriarch = sheet.createDrawingPatriarch();
    // 定义注释的大小和位置,详见文档
    HSSFComment comment = patriarch.createComment(new HSSFClientAnchor(0, 0, 0, 0, (short) 4, 2, (short) 6, 5));
    // 设置注释内容
    comment.setString(new HSSFRichTextString("可以在POI中添加注释！"));
    // 设置注释作者，当鼠标移动到单元格上是可以在状态栏中看到该内容.
    comment.setAuthor(author);
    // 产生表格标题行
    HSSFRow columnTitleRow = sheet.createRow(0);
    // 根据标题列名字，导出时显示相应的导出列名字
    Iterator<Map.Entry<String, String>> columIterator = columnNames.entrySet().iterator();
    int columnIndex = 0;
    String[] columns = new String[columnNames.size()];
    while (columIterator.hasNext()) {
      Map.Entry<String, String> entry = columIterator.next();
      String column = (String) entry.getKey();
      String columnName = (String) entry.getValue();
      HSSFCell cellTitle = columnTitleRow.createCell(columnIndex);
      cellTitle.setCellStyle(style);
      HSSFRichTextString text = new HSSFRichTextString(columnName);
      cellTitle.setCellValue(text);
      columns[columnIndex] = column;
      columnIndex++;
    }
    // 遍历集合数据，产生数据行
    int index = 1;// 行号
    Iterator<T> it = dataset.iterator();
    while (it.hasNext()) {
      // 创建一行
      HSSFRow columnValueRow = sheet.createRow(index);
      T t = (T) it.next();
      // 利用反射，根据javabean属性的先后顺序，动态调用getXxx()方法得到属性值
      for (int i = 0; i < columns.length; i++) {
        // 创建相应的单元格
        HSSFCell cellValue = columnValueRow.createCell(i);
        cellValue.setCellStyle(style2);
        String getMethodName = "get" + columns[i].substring(0, 1).toUpperCase() + columns[i].substring(1);
        try {
          Class tCls = t.getClass();
          Method getMethod = tCls.getMethod(getMethodName, new Class[]{});
          Object value = getMethod.invoke(t, new Object[]{});
          // 判断值的类型后进行强制类型转换
          String textValue = null;
          if (value != null) {
            if (value instanceof Integer) {
              int intValue = (Integer) value;
              textValue = String.valueOf(intValue);
            } else if (value instanceof Float) {
              float fValue = (Float) value;
              textValue = String.valueOf(fValue);
            } else if (value instanceof Double) {
              double dValue = (Double) value;
              textValue = String.valueOf(dValue);
            } else if (value instanceof Long) {
              long longValue = (Long) value;
              textValue = String.valueOf(longValue);
            } else if (value instanceof Boolean) {
              boolean bValue = (Boolean) value;
              textValue = "true";
              if (!bValue) {
                textValue = "false";
              }
            } else if (value instanceof Date) {
              Date date = (Date) value;
              SimpleDateFormat sdf = new SimpleDateFormat(pattern);
              textValue = sdf.format(date);
            } else if (value instanceof byte[]) {
              // 有图片时，设置行高为60px;
              columnValueRow.setHeightInPoints(60);
              // 设置图片所在列宽度为80px,注意这里单位的一个换算
              sheet.setColumnWidth(i, (short) (35.7 * 80));
              // sheet.autoSizeColumn(i);
              byte[] bsValue = (byte[]) value;
              HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0, 1023, 255, (short) 6, index, (short) 6, index);
              anchor.setAnchorType(2);
              patriarch.createPicture(anchor, workbook.addPicture(bsValue, HSSFWorkbook.PICTURE_TYPE_JPEG));
            } else {
              // 其它数据类型都当作字符串简单处理
              textValue = value.toString();
            }
          } else {
            continue;
          }
          // 如果不是图片数据，就利用正则表达式判断textValue是否全部由数字组成
          if (textValue != null) {
            Pattern p = Pattern.compile("^//d+(//.//d+)?$");
            Matcher matcher = p.matcher(textValue);
            if (matcher.matches()) {
              // 是数字当作double处理
              cellValue.setCellValue(Double.parseDouble(textValue));
            } else {
              HSSFRichTextString richString = new HSSFRichTextString(textValue);
              HSSFFont font3 = workbook.createFont();
              font3.setColor(HSSFColor.BLACK.index);
              richString.applyFont(font3);
              cellValue.setCellValue(richString);
            }
          }
        } catch (SecurityException e) {
          e.printStackTrace();
        } catch (NoSuchMethodException e) {
          e.printStackTrace();
        } catch (IllegalArgumentException e) {
          e.printStackTrace();
        } catch (IllegalAccessException e) {
          e.printStackTrace();
        } catch (InvocationTargetException e) {
          e.printStackTrace();
        } finally {
          // 清理资源
        }
        // 自动调整列的宽度
        sheet.autoSizeColumn(i);
      }
      index++;
    }
    // 根据列名填充相应的数据
    try {
      workbook.write(out);
      out.flush();
      out.close();
    } catch (IOException e) {
      e.printStackTrace();
    } finally {
      if (out != null) {
        try {
          out.flush();
          out.close();
        } catch (IOException e) {
          e.printStackTrace();
        }
      }
    }
  }

  /**
   * 创建导出标题
   *
   * @param titles
   * @param sheetName
   * @return
   */
  public static HSSFSheet createHSSFWorkbookTitle(HSSFWorkbook workbook, String[] titles, String sheetName) {

    // 生成一个表格
    HSSFSheet sheet = workbook.createSheet(sheetName);
    Row row = sheet.createRow(0);
    for (int celLength = 0; celLength < titles.length; celLength++) {
      // 创建相应的单元格
      Cell cell = row.createCell(celLength);
      cell.setCellValue(titles[celLength]);
    }

    return sheet;
  }

  /**
   * 输出附件
   *
   * @param titles
   * @return
   */
  public static void writeExcelFile(HttpServletRequest request, HttpServletResponse response, HSSFWorkbook workbook, String[] titles, String fileName) {
    // 根据列名填充相应的数据
    ServletOutputStream out = null;
    try {
      out = response.getOutputStream();
      response.reset();
      response.setContentType("application/msexcel;charset=utf-8");
    //response.setHeader("content-disposition", "attachment;filename=" + new String((fileName).getBytes("UTF-8"), "ISO8859-1"));
      String userAgent = request.getHeader("user-agent");
      if (userAgent != null && userAgent.indexOf("Edge") >= 0 ) {
      	fileName = URLEncoder.encode(fileName, "UTF8"); 
      }else if (userAgent.indexOf("Firefox") >= 0 || userAgent.indexOf("Chrome") >= 0
              || userAgent.indexOf("Safari") >= 0) {
          fileName = new String((fileName).getBytes("UTF-8"), "ISO8859-1");
      } else {
          fileName = URLEncoder.encode(fileName, "UTF8"); //其他浏览器
      }
      response.setHeader("content-disposition", "attachment;filename=" + fileName);
      
      workbook.write(out);
      out.flush();
      out.close();
    } catch (IOException e) {
      e.printStackTrace();
    } finally {
      if (out != null) {
        try {
          out.flush();
          out.close();
        } catch (IOException e) {
          e.printStackTrace();
        }
      }
    }
  }

  /**
   * 输出附件
   *
   * @param response
   * @param fileName
   * @param content
   * @return
   */
  public static void writeFile(HttpServletResponse response, String fileName, String content) {
    // 根据列名填充相应的数据
    ServletOutputStream out = null;
    try {
      out = response.getOutputStream();
      response.reset();
      response.setContentType("application/octet-stream;charset=utf-8");
      response.setHeader("content-disposition", "attachment;filename=" + fileName);
      out.write(content.getBytes("UTF-8"));
      out.flush();
      out.close();
    } catch (IOException e) {
      e.printStackTrace();
    } finally {
      if (out != null) {
        try {
          out.flush();
          out.close();
        } catch (IOException e) {
          e.printStackTrace();
        }
      }
    }
  }
}
